Dosing and metering device for shaft mouth

Abstract

The invention relates to the technical field of oil field exploitation, in particular to a dosing and metering device for a shaft mouth.The dosing and metering device comprises an adjusting valve, a stop valve, a blowoff valve, a funnel, a sewage discharge outlet, a sleeve, a medicament storage tank and a labeling column. The adjusting valve, the labeling column and the stop valve are connected in series with the bottom of the medicament storage tank in sequence. The stop valve is connected with the upper end of the medication storage tank connected with the funnel for a dosing port. The sleeve is communicated with the stop valve. The bottom of the medicament storage tank is communicated with the sewage discharge outlet via the blowoff valve.The dosing and metering device for the shaft mouth has following beneficial effects: long-term and stably continuous addition of medicament is achieved; medicament concentration of an output liquid medium is stably controlled so that the best medicament-adding effect is obtained; automatic dosing technology and self-control technology are adopted by the shaft mouth so that the problem that an antisludging agent and a corrosion inhibiter are hard to prepare on the site is solved; and requirements for timing, quantification and continuous medication addition of chemical agents are satisfied.

Description

technical field [0001] The invention relates to the technical field of oilfield development, in particular to an oilfield wellhead dosing and metering device. Background technique [0002] At present, most of the oil fields in the Ordos Basin have high water cut, serious scaling and corrosion of downhole pipes and rod strings, and the exploitation of some undeveloped reserves and some oil wells have abnormal oil production or well head back pressure due to reasons such as thick oil and wax deposition. High and difficult collection and transportation and many other problems. [0003] To solve these problems, it is necessary to add chemicals to the oil well to ensure the normal production of the oil well. There are defects in the manual dosing method commonly used in the field: one-time dosing cannot continuously exert the drug effect; there is no metering equipment at the wellhead, and the dosing amount cannot be guaranteed; there is no water dilution facility at the wellhea...

AI Technical Summary

Problems solved by technology

There are defects in the manual dosing method commonly used in the field: one-time dosing cannot continuously exert the drug effect; there is no metering equipment at the wellhead, and the dosing amount cannot be guaranteed; there is no water dilution facility at the wellhead, and the medicine hangs heavily on the wall and cannot all reach the bottom of the well; Workers are labor intensive

The dosing of the electric pressurized pump uses the reciprocating motion of the polished rod to drive the embolism pump to continuously add medicine in small doses. Its advantage is that the medicine solution can be continuously added to the annular space of the oil jacket, and the medicine solution is fully utilized; the disadvantage is that the life of the pump is short and the maintenance is complicated. The cost is high, and the individual parts of the tube and rod pump cannot be fully sealed and protected, and are easily damaged

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